remove unnecessary checks which introduced bug
remove unnecessary checks which introduced bug

Chatie/wechaty,Chatie/wechaty,mukaiu/wechaty,wechaty/wechaty,binsee/wechaty,Chatie/wechaty,binsee/wechaty,zixia/wechaty,binsee/wechaty,mukaiu/wechaty,wechaty/wechaty,wechaty/wechaty,zixia/wechaty,mukaiu/wechaty